The evils of too much coupling between services are far worse than the problems caused by code duplication.

- Sam Newman, Building Microservices

Microservice Federation

Logging

Security

Metrics and monitoring

First, what's a federation?

an organization that is made by loosely joining together smaller organizations

http://www.merriam-webster.com/dictionary/federation

the formation of a political unity, with a central government, by a number of separate states, each of which retains control of its own internal affairs.

http://dictionary.reference.com/browse/federation

In our terms: The formation of an application, with central governance of common infrastructure concerns, by a number of separate microservices, each of which retains control of its own internal design and implementation.

Real world examples

The advancement and diffusion of knowledge is the only guardian of true liberty.